Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Quem era o candidato quando o titular era Richard C. White?
 ###Tabelas: CREATE TABLE pool_l (pool_l_id AUTO_INCREMENT PRIMARY KEY, Date VARCHAR, Score VARCHAR, Set 1 VARCHAR, Set 2 VARCHAR, Set 3 VARCHAR, Total VARCHAR) CREATE TABLE  (_id AUTO_INCREMENT PRIMARY KEY, District VARCHAR, Incumbent VARCHAR, Party VARCHAR, First elected INT, Result VARCHAR, Candidates VARCHAR) CREATE TABLE taiwan (taiwan_id AUTO_INCREMENT PRIMARY KEY, 2010 ARWU Rankings VARCHAR, 2010 QS World Rankings VARCHAR, 2010 QS Asian Rankings VARCHAR, 2010 eduniversal Rankings VARCHAR, 2009 QS Asian Rankings: Int’l faculty review VARCHAR, 2009 QS Asian Rankings: Int’l student review INT, 2000 Singapore “Asiaweek” Rankings VARCHAR, University VARCHAR, Local VARCHAR, Median ranks INT) CREATE TABLE planetary_system (planetary_system_id AUTO_INCREMENT PRIMARY KEY, Companion (in order from star) VARCHAR, Mass VARCHAR, Semimajor axis ( AU ) VARCHAR, Orbital period ( s day ) VARCHAR, Eccentricity VARCHAR, Inclination VARCHAR) CREATE TABLE singles:_16_4_titles_12_runner-ups (singles:_16_4_titles_12_runner-ups_id AUTO_INCREMENT PRIMARY KEY, Outcome VARCHAR, Year VARCHAR, Tournament VARCHAR, Surface VARCHAR, Opponent in the final VARCHAR, Score VARCHAR)  
SELECT Candidates FROM  WHERE Incumbent = Richard C. White